Argh! Finally, I have the free time to post this tutorial, hope this can giving you guys a brief description on how I’ve done this. Tools: Dremel kits Hobby knife File Hair dryer Putty Super glue Epoxy glue Male/female adapter Thin wire Flat black paint 1.5mm Fiber optic cable 200 ohm resistor x 3 3mm LED: 2 red for eyes 7 white for chest 4 white for headlights 2 orange for signal. After removing the screw, take the head apart. [Then], take down the black gear part that [is] linking the head. Dremel the head area as shown. The picture shows only one side Dremel because [you can] clearly [see] the before and after. Paint the area to flat black, [leave] only 2 spots for the plastic to transmit the red lights to the eye: File down two (2) red LEDs to fit the length of the head. Fit the LED to the back part of the head. [Place] the LED's positive point downwards. Drill a hole there to allow your resistor and a thin wire to sneak inside. Solder resistor to the LED's "positive". Connect the thin wire to "negative". Notice (after removing the black gear part) the head will go off of his body because nothing blocks it beneath. Now this problem is solved with [placing]the resistor like that: After making sure the lights is on, always seal the part with epoxy: Now, drill the chest with a 1.5mm drill bit. Cut the side with hobby knife, making sure the part is well fitted to your switch. For mine, I cut both sides - another side is my adapter for external power: Fill in the fiber optic and seal it with putty. Using hair dryer to heat the fiber optic, bend them all to close enough. DO NOT overheat; it will melt, and the shape will run: Dremel the area large enough to fit your battery pack: Place two (2) LEDs in the hole. Beware [of] the back wheel when transforming it back to vehicle [mode]. Make sure the LED doesn’t block the hole that lets the back wheel to fit into the hole. Put some putty to make the LED hold in place. Then, wire the on/off switch to the LED's "+" and battery pack's "+", and wiring the LED's "-" to [the] battery pack's "-". I put an aquarium tube to the fiber optic; it helps lock the LED in place: After that is complete, you can now link all the LEDs to the place. Just make sure the "+" and "-" is wired correctly. If you wanna make external power as mine, that’s easy - just link the adapter to the LED [as] there's no need go over the switch.